EP3894344B1 - Vorrichtung zum falzen vom bahnmaterial, entsprechende anlage, verfahren zum falzen vom bahnmaterial, und entsprechendes verfahren zur herstellung von mehrlagigen verbundartikeln - Google Patents

Vorrichtung zum falzen vom bahnmaterial, entsprechende anlage, verfahren zum falzen vom bahnmaterial, und entsprechendes verfahren zur herstellung von mehrlagigen verbundartikeln Download PDF

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Publication number
EP3894344B1
EP3894344B1 EP19831891.7A EP19831891A EP3894344B1 EP 3894344 B1 EP3894344 B1 EP 3894344B1 EP 19831891 A EP19831891 A EP 19831891A EP 3894344 B1 EP3894344 B1 EP 3894344B1
Authority
EP
European Patent Office
Prior art keywords
guide
web material
layered composite
folder
web
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP19831891.7A
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English (en)
French (fr)
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EP3894344A1 (de
EP3894344C0 (de
Inventor
Marco Viola
Andrea VIOLA
Davide Viola
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MD Viola Macchine Srl
Original Assignee
MD Viola Macchine Srl
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Publication date
Application filed by MD Viola Macchine Srl filed Critical MD Viola Macchine Srl
Publication of EP3894344A1 publication Critical patent/EP3894344A1/de
Application granted granted Critical
Publication of EP3894344B1 publication Critical patent/EP3894344B1/de
Publication of EP3894344C0 publication Critical patent/EP3894344C0/de
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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/15577—Apparatus or processes for manufacturing
    • A61F13/15707—Mechanical treatment, e.g. notching, twisting, compressing, shaping
    • A61F13/15747—Folding; Pleating; Coiling; Stacking; Packaging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H45/00—Folding thin material
    • B65H45/12—Folding articles or webs with application of pressure to define or form crease lines
    • B65H45/22—Longitudinal folders, i.e. for folding moving sheet material parallel to the direction of movement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/20—Belts
    • B65H2404/25—Driving or guiding arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/20—Belts
    • B65H2404/26—Particular arrangement of belt, or belts
    • B65H2404/269—Particular arrangement of belt, or belts other arrangements
    • B65H2404/2693—Arrangement of belts on movable frame
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2801/00—Application field
    • B65H2801/57—Diaper manufacture

Definitions

  • the object of the present invention is a device and a method for folding web material in a plant and process for producing layered composite articles.
  • the present invention is situated in the field of production of layered composite articles formed by sheets of fabric and/or non-woven fabric (TNT) and possible further elements such to give the articles the desired properties (such as: impermeability, absorption, breathability, elasticity, etc.).
  • Such articles can for example be articles of clothing.
  • the present invention is situated in the field of production lines for producing sanitary articles, in particular pull-up baby diapers and adult diapers, whose packaging is executed starting from different semi-finished products, including webs of material wound in reels, such as, for example, polyethylene, non-woven fabric, cellulose wadding (tissue).
  • the web materials are unwound from reels in order to be subsequently fed to processing stations which provide for combining them with each other and possibly with other materials, in order to form a semi-finished product constituted by a layered composite web.
  • a semi-finished product constituted by a layered composite web which is subsequently shaped, in order to obtain a series of diapers that are open and joined together.
  • the layered composite web is the longitudinally folded in two and welded, so as to obtain a series of closed diapers that are joined together.
  • the abovementioned composite web is then cut to obtain the single diapers.
  • Such operations are carried out while the layered composite web continuously advances long a feeding path in a plant for producing the abovementioned diapers.
  • the layered composite web is then advanced from the first guide towards the second guide and is kept under traction at opposite longitudinal edges thereof and longitudinally driven. While the layered composite web advances, a longitudinal middle line portion (corresponding to the crotch of the pull-up diapers) of the layered composite web slides against a lower edge of the flattened body and is progressively moved downward by the abovementioned fixed lower edge while the opposite longitudinal edges (corresponding to the waist of the pull-up diapers) are maintained at a greater height and are brought close to each other until they touch. In this manner, the layered composite web is folded halfway along the longitudinal middle line portion thereof.
  • a folding unit of the above-illustrated type is for example schematically described in EP1410778 .
  • the document US 2016/228303 (published also as EP3037078 ) illustrates a folding unit which folds a sheet in two while this advances.
  • the folding unit comprises a belt wound on pulleys and moved along a closed path by a motor in order to operate as a friction reduction mechanism.
  • the document US 3 398 656 illustrates an apparatus for producing packages from a web material. The apparatus is provided with a device for folding the web material.
  • the Applicant has observed that often after the folding, due to the deformations and/or sliding of the layered composite web which is subjected to stresses during transport, the opposite longitudinal edges are misaligned with respect to each other. For example, if the web material slides substantially horizontally, one of the two edges is placed higher than the other.
  • the Applicant therefore set the object of proposing a device and a method for folding web material in a plant for producing layered composite articles, which allow first of all maintaining a desired and predefined relative position of the opposite longitudinal edges of the web material after the folding, in particular ensuring the mutual alignment of said longitudinal edges, and hence improving the quality of the layered composite articles obtained therefrom.
  • the Applicant has also set the objective of proposing a device and a method for folding web material which allow improving the quality of the junctions, preferably welds, executed on said web material after the folding.
  • the Applicant has also set the objective of proposing a device and a method for folding web material which allow obtaining the abovementioned result in a simple and effective manner.
  • the Applicant has also set the objective of proposing a device and a method for folding web material which can be easily adapted to different sizes/characteristics of the produced layered articles.
  • the Applicant has also set the objective of proposing a device for folding web material which, in addition to the above-indicated objectives, is also structurally simple, inexpensive and easy to manage and maintain.
  • the Applicant has found that such further objectives and objects can be obtained by orienting the flattened body around an adjustment axis lying in a vertical plane, in a manner so as to move one end of said flattened body close to the first guide with respect to said first guide.
  • the present invention relates to a device for folding web material in a plant for producing layered composite articles, preferably pull-up diapers, comprising:
  • the present invention relates to a method for folding web material in a process for producing layered composite articles, comprising:
  • the present invention relates to a plant for producing layered composite articles, comprising:
  • the present invention relates to a process for producing layered composite articles, comprising:
  • intermediate portion it is intended a longitudinal portion situated between the two opposite longitudinal edges.
  • Such intermediate portion can more or less coincide with a middle line portion of the web material equidistant from the two longitudinal edges. If said intermediate portion coincides with the middle line portion, then the web is folded in half and the two longitudinal edges are mutually aligned, i.e. placed at a same height so as to mate after the folding. If said intermediate portion is different from the middle line portion, then the two longitudinal edges are positioned at different heights after the folding.
  • the Applicant has verified that the solution according to the invention first of all allows mutually positioning with precision the opposite longitudinal edges of the web material after the folding, preferably ensuring the alignment between said opposite longitudinal edges after the folding, and hence improving the quality of the layered composite articles obtained therefrom.
  • the Applicant has verified that, by moving the first end of the elongated edge of the folder with respect to the first guide and thus also with respect to the intermediate portion, preferably with respect to the middle line, of the portion of web material which is arranged on the first guide, it is possible to compensate for the displacement of the intermediate portion of said web material, due to deformations and/or sliding of the same, more downstream, in a manner so as to mate said intermediate portion with the elongated edge at the second guide and hence ensure the desired mutual position, preferably the mutual alignment, of the opposite longitudinal edges of the web material downstream of the folder.
  • a rotation of the folder around the adjustment axis translates into a relative displacement of the opposite longitudinal edges of the web material folded in two, preferably in half.
  • the Applicant has in particular verified that the solution according to the invention allows aligning with precision the zones of the web material that must be mutually joined and hence making junctions, preferably welds, that are correct and high quality.
  • the feeding plane is a substantially horizontal plane.
  • the feeding plane is tilted with respect to a horizontal plane by an angle comprised between 0° and 15°.
  • the receiving plane is a substantially vertical plane.
  • the adjustment axis forms, with a vertical direction, an angle comprised between 0° and 15°.
  • the elongated edge is directed downward.
  • the elongated edge has a curvilinear progression.
  • said curvilinear progression has a convexity directed downward.
  • a distance of the elongated edge from the opposite longitudinal edges of the web material, measured in the receiving plane, increases starting from the first guide towards the second guide.
  • a first end of the elongated edge faces the first guide.
  • the first guide comprises a first transport surface at least partly parallel to the feeding plane.
  • the first transport surface is motorized.
  • the web material is arranged on the first transport surface.
  • the first guide comprises a first roller, in which the first transport surface is a radially external surface of the first roller.
  • the first roller has a rotation axis parallel to the feeding plane.
  • the first guide comprises a first conveyor belt, in which the first transport surface is a surface of said first conveyor belt.
  • the second guide comprises second transport surfaces that are opposite and parallel to the receiving plane.
  • the second transport surfaces are motorized.
  • the web material folded in two, preferably in half, is arranged between the second transport surfaces.
  • a second end of the elongated edge is arranged between the second transport surfaces.
  • the second guide comprises a pair of opposite second rollers, in which the second transport surfaces are radially external surfaces of the second rollers.
  • the opposite second rollers have rotation axes parallel to the receiving plane.
  • the second guide comprises a pair of second conveyor belts, in which the second transport surfaces are surfaces of said second conveyor belts.
  • the folder comprises a substantially flat body mainly extended in the receiving plane.
  • the elongated edge is a lower edge of said substantially flat body.
  • the folder can be oriented around the adjustment axis by an angle comprised between +/-15°, preferably comprised between +/-10°, with respect to an average position corresponding to a mid-point of the first guide.
  • the folder can be oriented around the adjustment axis by an angle comprised between +/-15°, preferably comprised between +/-10°, with respect to a middle line portion of the section of web material placed on the first guide.
  • the folder is hinged to a support around said adjustment axis.
  • the folder is hung from said support.
  • the folder comprises an arm having one end connected to the substantially flat body and an opposite end hinged to said support around the adjustment axis.
  • the adjustment axis passes through the, or near the, second end of the elongated edge.
  • an actuator is connected to the folder, preferably to the substantially flat body, and is configured for moving said folder around the adjustment axis.
  • the actuator is connected to the folder near the first end.
  • the actuator is a linear actuator.
  • the actuator is of screw/nut screw type.
  • the folder is manually moved around the adjustment axis.
  • the actuator is manually actuated, for example by means of a thrust lever.
  • locking devices are configured for locking the folder in the desired position.
  • the actuator is of electrical, pneumatic or hydraulic type.
  • the actuator comprises a rod having one end hinged to the folder and an opposite end hinged to a fixed frame of the device and/or of the plant.
  • At least one position sensor is configured for detecting a position, preferably relative position, of the opposite longitudinal edges of the web material.
  • said at least one position sensor is mounted at the second end of the folder, preferably of the substantially flat body.
  • said at least one position sensor is mounted alongside the folder, preferably alongside the substantially flat body.
  • said at least one position sensor is mounted integral with the fixed frame of the device and/or of the plant.
  • said at least one position sensor is of optical or ultrasound type.
  • said at least one position sensor comprises a video camera.
  • said at least one position sensor comprises two position sensors, each position sensor being arranged on a respective side of the folder, preferably of the substantially flat body, in order to spot a respective longitudinal edge of the web material that is at least partly folded.
  • a position of the position sensor(s) is adjustable.
  • an electronic control unit is operatively connected to the actuator.
  • the electronic control unit is operatively connected to said at least one position sensor.
  • the electronic control unit is configured or programmed for executing the following procedure: receiving from said at least one position sensor at least one signal related to the position, preferably relative position, of the opposite longitudinal edges of the web material; controlling the actuator as a function of said at least one signal up to mutually positioning the opposite longitudinal edges in a desired position, preferably up to mutually aligning the opposite longitudinal edges.
  • the electronic control unit is configured or programmed for executing the following procedure: receiving, from each of the two position sensors, a respective signal; calculating a difference between the two signals.
  • the electronic control unit is configured or programmed for executing the following procedure: controlling the actuator in order to rotate the folder around the adjustment axis up to obtaining a predetermined and desired misalignment.
  • the electronic control unit is configured or programmed for executing the following procedure: controlling the actuator in order to rotate the folder around the adjustment axis if said difference is non-zero.
  • the electronic control unit is configured or programmed for executing the following procedure:
  • the web material is a layered composite web.
  • the layered composite articles are pull-up diapers.
  • the web material comprises a plurality of layered composite articles joined together in series and, preferably, configured for making pull-up diapers.
  • the intermediate portion, preferably middle line portion, of the layered composite web corresponds with a crotch of the pull-up diapers.
  • the opposite longitudinal edges of the layered composite web correspond with the waist of the pull-up diapers.
  • the portions to be mutually joined correspond with the sides of each pull-up diaper.
  • the folder comprises a motorized conveyor arranged along the elongated edge, movable from the first guide towards the second guide and configured for accompanying and/or driving the intermediate portion, preferably middle line portion, of the web material along said elongated edge.
  • moving the intermediate portion also comprises: accompanying and/or driving the intermediate portion of the web material from the first guide towards the second guide.
  • the motorized conveyor comprises a transport belt extended at least partly along the elongated edge.
  • the motorized conveyor comprises a plurality of pulleys.
  • the transport belt is wound on said pulleys.
  • the substantially flat body comprises two side-by-side plates delimiting a housing between them for the transport belt.
  • actively accompanying and/or driving the intermediate portion, preferably middle line portion comprises: adjusting or maintaining a relative position between the waist and the crotch of each of the pull-up diapers while the web material is folded.
  • the Applicant has verified that the motorized conveyor prevents the intermediate portion from remaining behind with respect to the opposite longitudinal edges of the web material. Indeed, the motorized conveyor is moved together with the intermediate portion and accompanies/drives it towards the second guide, maintaining the web material substantially undeformed.
  • reference number 1 overall indicates a manufacturing plant for producing layered composite articles 2.
  • the plant 1, illustrated as preferred embodiment, is configured for producing pull-up diapers 2.
  • the plant 1 can be configured for producing other types of sanitary articles or clothing articles or accessories.
  • the packaging of the abovementioned layered composite articles 2 is executed starting from different semi-finished products, including webs of material 3 wound in reels 4, such as polyethylene, non-woven fabric, cellulose wadding (tissue), etc..
  • the webs of material 3 are continuously fed through the plant 1 along respective paths and are joined, shaped, adapted and cut, etc., in order to give rise to the abovementioned layered composite articles 2.
  • the plant 1 comprises a first sector 5 along which the webs of material 3 are joined together to form a continuous semi-finished product constituted by a layered composite web 6 fed along a transport direction "F".
  • the layered composite web 6 is rotated 90° while it advances towards a second sector 7 in which it is cut/shaped.
  • the layered composite web 6 is folded in two along a longitudinal line and then, in a fourth sector 9, welds are executed and the single articles/diapers 2 are separated from each other.
  • the plant 1 comprises a plurality of reel-carriers 10 for the respective reels 4 of webs of material 3.
  • the first sector 5 is provided with conveyor and transmission devices which define respective paths for said webs of material 3 and joining/gluing devices acting along said paths in order to join together said webs of material 3 and with further elements and form the layered composite web 6.
  • the second sector 7 comprises conveyor and transmission devices for the layered composite web 6 and cutting and shaping devices.
  • the third sector 8 comprises a device 11 for folding web material, illustrated in detail hereinbelow, and one or more welding stations.
  • the fourth sector 9 comprises at least one cutting device configured for cutting said folded layered composite web 6 and separating the layered composite articles 2 (pull-up diapers) from each other.
  • the layered composite web 6 coming from the second sector 7 and directed towards the third sector 8 is constituted by a plurality of pull-up diapers 2 that are open and already shaped following the leg opening operation, i.e. creation of the openings for the legs.
  • the layered composite web 6 coming from the third sector 8 and directed towards the fourth sector 9 is constituted by the plurality of pull-up diapers 2 that are closed and welded at the sides but still joined in series with each other.
  • the following are visible: the dashed lines 100 ( figures 1 and 4 ) along which the crotch 200 and the waist 300 of each diaper 2 will be cut in order to separate them.
  • the dashed lines 100 also indicate the welded zones at the sides of each diaper 2.
  • the device for folding web material 11 ( figure 2 ) comprises a first guide defined by a first roller 12 rotatable around a horizontal rotation axis "X-X" thereof and preferably connected to a motor, not illustrated and configured for rotating it around said rotation axis "X-X".
  • An upper portion of a radially external surface of the first roller 12 defines a first transport surface for the layered composite web 6 coming from the second sector 7.
  • the layered composite web 6 is partially wound on the abovementioned radially external surface of the first roller 12.
  • the first guide can comprise a first conveyor belt partially wound around the first roller 12.
  • a second guide comprising a pair of opposite second conveyor belts 13 wound on respective opposite second rollers 14 (more visible in figure 4 ) is situated downstream of the first roller 12 and is spaced therefrom.
  • the second rollers 14 are preferably motorized and rotate around respective rotation axes "Y-Y" lying in vertical planes. Internal branches of the second conveyor belts 13 define second transport surfaces for the layered composite web 6.
  • the rotation axes "Y-Y" of the second rollers 14 are tilted with respect to a vertical direction by an angle of about 5°, so that the second conveyor belts 13 are moved along a feed direction "V" tilted by about 5° with respect to a horizontal direction.
  • the conveyor belts 13 are absent and the second transport surfaces are radially external surfaces of the second rollers 14.
  • the second guide is therefore placed downstream of the first guide with respect to the feed direction "V" of the layered composite web 6.
  • the first guide defines a feeding plane for feeding the layered composite web 6 which leaves the first roller 12.
  • Such feeding plane is tilted by the abovementioned angle of about 5° and it is also the plane in which the layered composite web 6 lies immediately downstream of the first roller 12.
  • the rotation axis "X-X" of the first roller 12 is parallel to the feeding plane.
  • the second guide defines a receiving plane for receiving the layered composite web 6.
  • Such receiving plane is vertical and is parallel to the and interposed between the second transport surfaces of the second conveyor belts 13.
  • the receiving plane is therefore orthogonal to the feeding plane.
  • a folder 15 is arranged between the first guide and the second guide and is configured for folding in two the layered composite web 6 along an intermediate portion thereof.
  • the folder 15 is arranged between the first guide and the second guide and is configured for folding in half the layered composite web 6 along a longitudinal middle line portion 16 thereof and for approaching opposite longitudinal edges 17 of said layered composite web 6 while the layered composite web 6 continuously moves from the first guide towards the second guide along the abovementioned feed direction "V".
  • the layered composite web 6 lies open in the feeding plane when it is situated just downstream of the first roller 12 and is folded in two when it is situated between the second transport surfaces of the second conveyor belts 13.
  • the folder 15 comprises a substantially flat body 18 defined by two side-by-side plates delimiting a housing between them.
  • the substantially flat body 18 is situated in a vertical plane, i.e. substantially in the receiving plane.
  • a lower elongated edge 19 of the substantially flat body 18 is extended between the first guide and the second guide and has a first end 20 close to the first guide and a second end 21 close to the second guide.
  • the elongated edge 19 has a curvilinear progression with a convexity directed downward.
  • the first roller 12 partly lies below the first end 20 of the elongated edge 19 and such first end 20 faces the radially external surface of the first roller 12.
  • the second end 21 of the elongated edge 19 terminates between the second rollers 14.
  • the elongated edge 19 has a first part, close to the first end 20, with a greater curvature which is extended downward, followed by a second part with lesser curvature and by a third substantially rectilinear part that terminates in the second end 21.
  • the elongated edge 19 is therefore extended from the first guide towards the second guide in the receiving plane and progressively downward, i.e. away from the feeding plane.
  • a distance of the elongated edge 19 from the opposite longitudinal edges 17 of the web 6, measured in the receiving plane, increases starting from the first guide towards the second guide.
  • the pulleys 23 are rotatably mounted between the abovementioned two plates and are provided with teeth.
  • the transport belt 22 is for example toothed and teeth of said belt 22 are engaged with the pulleys 23.
  • Other types of belts can be used, for example, flat belts, polycord belts, trapezoidal belts etc..
  • the transport belt 22 is extended along a closed path substantially lying in the receiving plane.
  • a lower branch 24 of the transport belt 22 is arranged along the elongated edge 19 and projects from said elongated edge 19.
  • a guide element 25 is mounted between the two side-by-side plates and the lower branch 24 can slide against this. In place of the guide element 25, a plurality of small rollers can be present, not illustrated.
  • One of the pulleys 23 is motorized, i.e. it is connected to a motor 26, in order to rotate said pulley 23 and move the transport belt 22 along the closed path.
  • a motion sense of the transport belt 22 along the closed path is such to move the branch 24 from the first guide towards the second guide.
  • the transport belt 22, together with the pulleys 23, with the guide 25 and with the motor 26 therefore defines a motorized conveyor, arranged along the elongated edge 19 and movable from the first guide towards the second guide.
  • the motor 26 is mounted on a fixed frame 27 of the plant 1 defined by a vertical wall.
  • the folder 15 is spaced from said vertical wall and the motor 26 is connected to the pulley 23 placed above the first end 20 of the elongated edge 19 by means of a Cardan shaft 28 which is extended from the motor 26 and from said vertical wall up to the pulley 23.
  • the folder 15 is hinged to and hung from a support 29 around an adjustment axis "K-K".
  • the support 29 is a bar which is extended cantilevered from the vertical wall and bears a pivot, in order to rotatably connect the folder 15, placed at a terminal end thereof.
  • the folder 15 comprises an arm 30 which has one end integrally connected to the substantially flat body 18 and an opposite end hinged to said support 29 around the adjustment axis "K-K".
  • the arm 30 is substantially extended parallel to the feed direction "V" and the opposite end is joined to an intermediate zone of the substantially flat body 18.
  • the adjustment axis "K-K” passes near the second end 21 of the elongated edge 19, is orthogonal to the feed direction "V" and lies in a vertical plane, i.e. in the receiving plane.
  • the adjustment axis "K-K” forms, with a vertical direction, an angle of about 5°.
  • the folder 15 can be oriented around the abovementioned adjustment axis "K-K", in order to vary a position of the first end 20 of said elongated edge 19 with respect to the first roller 12, so as to adjust a mutual alignment of the opposite longitudinal edges 17 at the second conveyor belts 13.
  • An actuator 31 is connected to the substantially flat body 18 and is configured for moving the folder 15 around the adjustment axis "K-K".
  • the actuator 31 is situated between the vertical wall and the substantially flat body 18.
  • the actuator 31 is a linear actuator (e.g. electric, screw/nut screw type, pneumatic or hydraulic) and has a rod 32 provided with one end 33 hinged to the folder 15 (or to an element integral with the folder 15) and with an opposite end 34 hinged to the fixed frame 27 (or to an element integral with the fixed frame 27).
  • the end 33 hinged to the folder 15 is situated at the first end 20 of the elongated edge 19, i.e. at the Cardan shaft 28.
  • the travel of the rod 32 is such to allow orienting the folder 15 around the adjustment axis "K-K” by an angle " ⁇ " comprised between +/-15°, preferably comprised between +/-10°, with respect to an average position in which the substantially flat body 18 is parallel to the wall 27 and the first end 20 of the elongated edge 19 faces a mid-point of the first roller 12, i.e. to the middle line portion 16 of the web section 6 placed on the first roller 12.
  • the Cardan shaft 28 allows the folder 15 to oscillate as illustrated around the adjustment axis "K-K" due to a slidable coupling 28A between two parts of the same shaft 28 ( figure 10 ).
  • Such coupling is for example of splined type in order to prevent the rotation between said two parts.
  • the device 1 for folding web material also comprises two position sensors of optical type, each position sensor being arranged on a respective side of the folder 15.
  • the position sensors are mounted on a respective support bar 35 which projects from the wall 27, is integral with the wall 27 itself and is situated below the folder 15.
  • the two position sensors are positioned near the second guide, i.e. the second conveyor belts 13.
  • a first position sensor 36 of said two position sensors is situated between the wall 27 and the substantially flat body 18.
  • a second position sensor 37 of said two position sensors is situated on a side opposite the substantially flat body 18.
  • Each of the two position sensors is mounted on a respective small arm 38 in turn mounted on the support bar 35 and such small arm 38 allows an adjustment of the position of the respective sensor.
  • Each of the abovementioned sensors 36, 37 comprises an emitter and an optical receiver that are mutually facing and spaced from each other in a manner such that one of the opposite longitudinal edges 17 can slide between the emitter and the receiver.
  • the two position sensors are configured for detecting a relative position of the two opposite longitudinal edges 17 of the layered composite web 6, in particular a height of said two opposite longitudinal edges 17.
  • the two position sensors are configured for supplying a differential signal that is a function of the difference of the height position of the two opposite longitudinal edges 17.
  • different sensors can be provided, for example video cameras or ultrasound sensors or still more.
  • An electronic control unit 39 is operatively connected to the motor 26 of the motorized conveyor, to the non-illustrated motor which moves the first roller 12 and to the non-illustrated motor which moves the pair of conveyor belts 13.
  • the electronic control unit 39 is also operatively connected to the actuator 31 and to the first and second position sensor 36, 37.
  • Such electronic control unit 39 is for example the electronic control unit of the entire plant 1.
  • the layered composite web 6 which lies open in the feeding plane when it is situated just downstream of the first roller 12, encounters the first end 20 of the elongated edge 19. Said elongated edge 19 comes into contact with the middle line portion 16 of the layered composite web 6 and, while the web 6 advances towards the second guide, moves the middle line portion 16 downward while the opposite longitudinal edges 17 continue the rectilinear movement thereof.
  • the middle line portion 16 is progressively moved away from the feeding plane while the opposite longitudinal edges 17 are maintained at a higher elevation with respect to the middle line portion 16 and they progressively approach each other. In this manner, the layered composite web 6 is progressively folded in half.
  • the middle line portion 16 comes into contact with the branch 24 of the transport belt 22 and is accompanied or driven by the branch 24 towards the second guide. In other words, the middle line portion 16 is moved together with the branch 24 without sliding on the elongated edge 19.
  • a power delivered by the motor 26 and hence a speed of the transport belt 22, i.e. a driving speed for the middle line portion 16 it is possible to prevent the middle line portion 16 from remaining behind with respect to the opposite longitudinal edges 17 of the layered composite web 6 and hence prevent said layered composite web 6 from being deformed.
  • the adjustment of the speed of the transport belt 22 allows maintaining an alignment between the waist 300 and the crotch 200 of each pull-up diaper 2 and preventing the deformation of the single diapers 2 before the welding of the sides.
  • the speed of the motorized conveyor at the start of a production batch, as a function of a speed of the plant 1 and in particular of a speed of the first roller 12 and of a speed of the second conveyor belts 13 and/or of characteristics/dimensions of the pull-up diapers 2 to produce, such that the abovementioned alignment is maintained.
  • the electronic control unit 39 receives, from each of said first and second position sensor 36, 37, a respective signal as a function of a position of a section of a respective opposite longitudinal edge 17 of the layered composite web 6 when this is situated just before the second conveyor belts 13. In such position, the folding step is nearly complete, the layered composite web 6 is arranged as a V and the two abovementioned opposite longitudinal edges 17 are close to each other even if they do not touch ( figures 5 and 6 ).
  • the electronic control unit 39 calculates a difference between the two signals. Such difference is a function of a height difference " ⁇ h" (misalignment) of the two opposite longitudinal edges 17 ( figure 5 ). If such difference is non-zero, this signifies that the middle line portion 16 of the layered composite web 6 is moved laterally with respect to the elongated edge 19, as in figure 5 .
  • ⁇ h height difference
  • the electronic control unit 39 is programmed for controlling the actuator 31 so as to rotate the folder 15 around the adjustment axis "X-X" by an angle " ⁇ " and in a sense such to bring the two opposite longitudinal edges 17 to a same height and hence cancel the abovementioned height difference " ⁇ h".
  • the electronic control unit 39 is programmed for rotating the folder 15 towards the longitudinal edge 17 placed higher and by an angle proportional to the detected height difference " ⁇ h".
  • the folder 15 is rotated towards the wall 27 in order to move the first end 20 of the longitudinal edge 19 towards said wall 27 and in this manner lift the longitudinal edge 17 placed at the second position sensor 37 and lower the other, up to aligning the two edges ( figure 6 ) with each other.
  • the opposite longitudinal edges 17 of the layered composite web 6 are therefore aligned with each other when they enter between the second conveyor belts 13 and, in this manner, the zones belonging to the two opposite longitudinal edges 17 and to be welded together mate with precision.
  • the welding stations Downstream of the second conveyor belts 13, the welding stations provide for executing the welds correctly.
  • the folder is manually moved around the adjustment axis by actuating, by means of a thrust lever, the actuator which for example is of screw/nut screw type, and it is then locked in the desired position by means of suitable locking devices.
  • the position of the opposite longitudinal edges of the web material is visually controlled by an operator or it can be provided on a display by the control unit connected to the abovementioned sensors.

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Manufacturing & Machinery (AREA)
  • Epidemiology (AREA)
  • Biomedical Technology (AREA)
  • Mechanical Engineering (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Laminated Bodies (AREA)

Claims (15)

  1. Vorrichtung zum Falten von Bahnmaterial in einer Anlage zum Erzeugen von Schichtverbund-Gegenständen, vorzugsweise Pull-Up-Windeln, umfassend:
    eine erste Führung, welche eine Zuführebene zum Zuführen eines Bahnmaterials (6) definiert;
    eine zweite Führung, welche eine Aufnahmeebene zum Aufnehmen des Bahnmaterials (6) definiert, wobei die zweite Führung in Bezug auf eine Zuführrichtung (V) des Bahnmaterials (6) stromabwärts der ersten Führung positioniert ist, wobei die Aufnahmeebene orthogonal zu der Zuführebene ist;
    eine Falteinheit (15), welche zwischen der ersten Führung und der zweiten Führung angeordnet ist und einen länglichen Rand (19) umfasst, welcher sich zwischen der ersten Führung und der zweiten Führung erstreckt und ein erstes Ende (20) in der Nähe der ersten Führung und ein zweites Ende (21) in der Nähe der zweiten Führung aufweist;
    wobei sich der längliche Rand (19) von der ersten Führung in Richtung der zweiten Führung in der Aufnahmeebene und von der Zuführebene weg erstreckt, um einen Zwischenabschnitt (16) des Bahnmaterials (6) progressiv weg von der Zuführebene zu bewegen und das Bahnmaterial (6) in zwei Teile zu falten, wenn es von der ersten Führung in Richtung der zweiten Führung läuft;
    dadurch gekennzeichnet, dass die Falteinheit (15) um eine Einstellachse (K-K) herum ausgerichtet werden kann, welche in der Nähe der zweiten Führung angeordnet ist und in der Aufnahmeebene liegt, um eine Position des ersten Endes (20) des länglichen Randes (19) in Bezug auf die erste Führung zu variieren, um eine gegenseitige Position entgegengesetzter longitudinaler Ränder (17) des Bahnmaterials (6) an der zweiten Führung einzustellen.
  2. Vorrichtung nach Anspruch 1, wobei die Falteinheit (15) um die Einstellachse (K-K) um einen Winkel (α) ausgerichtet sein kann, welcher zwischen +/-10° in Bezug auf eine durchschnittliche Position umfasst ist, welche einem Mittelpunkt der ersten Führung entspricht.
  3. Vorrichtung nach Anspruch 1 oder 2, wobei die Falteinheit (15) gelenkig mit einer Halterung (29) um die Einstellachse (K-K) verbunden ist.
  4. Vorrichtung nach Anspruch 3, wobei die Falteinheit (15) an der Halterung (29) aufgehängt ist.
  5. Vorrichtung nach Anspruch 3 oder 4, wobei die Falteinheit (15) einen im Wesentlichen flachen Körper (18), welcher sich hauptsächlich in der Aufnahmeebene erstreckt, und einen Arm (30) umfasst, welcher ein Ende, welches mit dem im Wesentlichen flachen Körper (18) verbunden ist, und ein entgegengesetztes Ende aufweist, welches um die Einstellachse (K-K) herum gelenkig mit der Halterung (29) verbunden ist.
  6. Vorrichtung nach einem der Ansprüche 1 bis 5, umfassend einen Aktuator (31), welcher mit der Falteinheit (15) verbunden ist und dazu eingerichtet ist, die Falteinheit (15) um die Einstellachse (K-K) zu bewegen.
  7. Vorrichtung nach Anspruch 6, wobei der Aktuator (31) mit der Falteinheit (15) in der Nähe des ersten Endes (20) verbunden ist.
  8. Vorrichtung nach einem der Ansprüche 1 bis 7, umfassend wenigstens einen Positionssensor (36, 37), welcher dazu eingerichtet ist, eine Position der entgegengesetzten longitudinalen Ränder (17) des Bahnmaterials (6) zu detektieren.
  9. Vorrichtung nach Anspruch 8, sofern dieser von Anspruch 6 oder 7 abhängt, umfassend eine elektronische Steuereinheit (39), welche betriebsmäßig mit dem Aktuator (31) und dem wenigstens einen Positionssensor (36, 37) verbunden ist, und dazu eingerichtet oder programmiert ist, die folgende Vorgehensweise auszuführen:
    - Empfangen, von dem wenigstens einen Positionssensor (36, 37), wenigstens eines Signals in Bezug auf die entgegengesetzten longitudinalen Ränder (17) des Bahnmaterials (6);
    - Steuern des Aktuators (31) als eine Funktion des wenigstens einen Signals bis zu einem gegenseitigen Positionieren der entgegengesetzten longitudinalen Ränder (17).
  10. Verfahren zum Falten von Bahnmaterial in einem Prozess zum Erzeugen von Schichtverbund-Gegenständen, umfassend:
    Zuführen eines Bahnmaterials (6) entlang einer Zuführrichtung (V) und von einer ersten Führung, welche eine Zuführebene zum Zuführen des Bahnmaterials (6) definiert, in Richtung einer zweiten Führung, welche eine Aufnahmeebene zum Aufnahmen des Bahnmaterials (6) definiert, wobei die zweite Führung in Bezug auf die Zuführrichtung (V) des Bahnmaterials (6) stromabwärts der ersten Führung positioniert ist, wobei die Aufnahmeebene orthogonal zu der Zuführebene ist;
    Platzieren eines Zwischenabschnitts (16) des Bahnmaterials (6) in Kontakt mit einem länglichen Rand (19) einer Falteinheit (15), welche zwischen der ersten Führung und der zweiten Führung angeordnet ist;
    Bewegen des Zwischenabschnitts (16) des Bahnmaterials (6) entlang der Aufnahmeebene und
    weg von der Zuführebene und von entgegengesetzten longitudinalen Ränder (17) des Bahnmaterials (6), durch Gleiten des Zwischenabschnitts (16) an dem länglichen Rand (19), wenn er von der ersten Führung in Richtung der zweiten Führung läuft; um das Bahnmaterial (6) in zwei Teile zu falten;
    dadurch gekennzeichnet, dass es ferner umfasst:
    Ausrichten der Falteinheit (15) um eine Einstellachse (K-K) herum, welche in der Nähe der zweiten Führung angeordnet ist und in der Aufnahmeebene liegt, um eine Position eines ersten Endes (20) des länglichen Randes (19) in Bezug auf die erste Führung zu variieren, um eine gegenseitige Position der entgegengesetzten longitudinalen Ränder (17) nach dem Falten einzustellen.
  11. Verfahren nach Anspruch 10, umfassend: Detektieren einer Fehlausrichtung zwischen den entgegengesetzten longitudinalen Rändern (17) und Ausrichten der Falteinheit (15) bis die Fehlausrichtung eliminiert ist.
  12. Verfahren nach Anspruch 10, umfassend: Detektieren einer Fehlausrichtung zwischen den entgegengesetzten longitudinalen Rändern (17) und Ausrichten der Falteinheit (15) bis eine vorbestimmte Fehlausrichtung erhalten wird.
  13. Verfahren nach Anspruch 10 oder 11, wobei das Bahnmaterial eine Mehrzahl von Schichtverbund-Gegenständen umfasst, welche in Reihe miteinander verbunden sind und dazu eingerichtet sind, Pull-Up-Windeln (2) herzustellen; wobei der Zwischenabschnitt (16) einem Schritt (200) der Pull-Up-Windeln (2) entspricht, wobei die entgegengesetzten longitudinalen Ränder (17) des Bahnmaterials (6) dem Bund (300) der Pull-Up-Windeln (2) entsprechen.
  14. Anlage zum Erzeugen von Schichtverbund-Gegenständen, umfassend:
    eine Mehrzahl von Rollenträgern (10) für jeweilige Rollen (4) von Bahnen von Material (3);
    eine Mehrzahl von Förder-und-Übertragungs-Vorrichtungen, welche jeweilige Pfade für die Bahnen von Material (3) definieren;
    eine Mehrzahl von Verbindungsvorrichtungen, welche entlang der Pfade wirken, um die Bahnen von Material (3) und mögliche weitere Elemente miteinander zu verbinden und um eine Schichtverbund-Bahn (6) zu bilden;
    wenigstens eine Schneidvorrichtung zum Schneiden der Schichtverbund-Bahn (6) und zum Bilden von Schichtverbund-Gegenständen (2);
    wobei die Anlage (1) ebenfalls eine Vorrichtung gemäß einem der Ansprüche 1 bis 9 umfasst;
    wobei das durch die Vorrichtung (1) gefaltete Bahnmaterial eines aus den Bahnen von Material (3) und/oder der Schichtverbund-Bahn (6) ist.
  15. Prozess zum Erzeugen von Schichtverbund-Gegenständen, umfassend:
    Zuführen von Bahnen von Material (3) entlang jeweiliger Pfade;
    Zuordnen und Verbinden der Bahnen von Material (3) und möglicher weiterer Elemente miteinander, um eine Schichtverbund-Bahn (6) zu bilden;
    Schneiden der Schichtverbund-Bahn (6), um Schichtverbund-Gegenstände (2) zu bilden;
    wobei der Prozess ebenfalls ein Verfahren gemäß wenigstens einem der Ansprüche 10 bis 13 umfasst;
    wobei das Bahnmaterial des Verfahrens eines aus den Bahnen von Material (3) und/oder der Schichtverbund-Bahn (6) ist.
EP19831891.7A 2018-12-12 2019-11-28 Vorrichtung zum falzen vom bahnmaterial, entsprechende anlage, verfahren zum falzen vom bahnmaterial, und entsprechendes verfahren zur herstellung von mehrlagigen verbundartikeln Active EP3894344B1 (de)

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IT102018000011041A IT201800011041A1 (it) 2018-12-12 2018-12-12 Dispositivo e metodo per piegare materiale in nastro in un impianto e processo per la produzione di articoli compositi a strati
PCT/IB2019/060283 WO2020121103A1 (en) 2018-12-12 2019-11-28 Device and method for folding web material in a plant and process for producing layered composite articles

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IT202000024730A1 (it) 2020-10-20 2022-04-20 M D Viola Macch S R L Dispositivo e metodo per piegare un nastro composito in un impianto e processo per la produzione di pannolini a mutandina

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US3398656A (en) * 1966-07-28 1968-08-27 Cloud Machine Corp Web guiding and plowing system for a packaging machine and the like
US6913664B2 (en) * 2001-05-23 2005-07-05 Zuiko Corporation Method and apparatus for producing disposable worn article
CN103848262A (zh) * 2012-12-06 2014-06-11 青岛凯妙服饰股份有限公司 布料对折复卷机
US10383774B2 (en) * 2013-09-30 2019-08-20 Zuiko Corporation Device for producing disposable wearable article and method for producing disposable wearable article
US9492336B2 (en) * 2013-10-18 2016-11-15 The Procter & Gamble Company Absorbent article having a composite web with visual signal thereon
DE102016105157A1 (de) * 2016-03-21 2017-09-21 Bundesdruckerei Gmbh Verfahren zur Herstellung eines Folienverbundes aus mehreren Materialbahnen für ein Wert- oder Sicherheitsdokument

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CN113165823A (zh) 2021-07-23
PL3894344T3 (pl) 2024-04-08
WO2020121103A1 (en) 2020-06-18
US20210275361A1 (en) 2021-09-09
EP3894344A1 (de) 2021-10-20
US11617688B2 (en) 2023-04-04
IT201800011041A1 (it) 2020-06-12
EP3894344C0 (de) 2023-11-22

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